Typewriting machine



June 5, 1923.

' 1,457,620 B. J. Down ET AL TYPEWRITING MACHINE Filled July s, 122 2sheets-sheet 2 3512*@ @1MM/maj,

Patented .lune 5, 1923.

A 't E fifi..

BERNARD J'. DOWD AND ANTHONY UTZ, OF HARTFORD. CONNECTICUT, .ASSIG'NORSlT0 ROYAL TYPEWRITER COMPANY INC., OF NEW YORK, N. Y.,.A CORPORATION 0FNnw YORK.

Application filed July 3,

To all whom t may concern Be it known that we, BERNARD J. Down, acitizen of the United States, and a resident of Hartford, in the countyof Hartford and State of Connecticut, and ANTHONY U'rz, a citizen of theUnited States, and a resident of Hartford, in the county of Hartford andState of Connecticut, have invented certain new and useful Improvementsin Typewriting Machines, of which the following isa specification. l

This invention relates generally to type bar actions for typewritingmachines and has for its main object a construction whereby a uniformtouch of the keys' comprising. the keyboard coupled with greatersimplicity than has heretofore existed in the construction of the trainof connections composing the type bar action, is obtained.

In the accompanying drawings, the invention is disclosed in severalconcrete and preferred forms in which:

Fig. 1 is a vertical longitudinal sectional view through the well-knownRoyal. type* writing machine with parts omitted for the sake ofclearness, the parts shown being the elements comprising the type baraction of the machine in their relation to the platen.

Fig. 2 is a horizontal sectional view on, the plane of line 2 -2 of Fig.1.

Fig. 3 is a view similar to Fig. 1 showing a modified form of theinvention.

1 indicates a platen, 2 is a type'bar segment extending transversely ofthe machine and curved in a vertical direction land' 3 indicates aseries of typebars pivotally connected at 4 to said type bar segment andnormally occupying a forwardly recumbent position in engagement withhead rest 5. 6 indicates a 'series of key levers pivotally supported onshaft 7; and 8`indicates a universal bar. Connected to the heel of eachtype bar is a draw link 9, the other end of which is connected to frontlink 10 pivotally supported in the framework; and extending between eachfront link and its complementary key lever is a vertical link 11. Spring12 restores the key lever to its uppermost position after it has beendepressed. 13 is a universal bar link extending between the universalbar andthe train of connections including the key lever and type bar. 14is a type bar operating spring TYPEWRITING MACHINE.

1922. Serial No. 572,395.

surrounding -each universal bar link, one

end of which is connected to someelement of the; type bar action andtherother end of which 1s anchored extraneously thereof as -on theframework or onadjustable member 15. It will be understood that there isonly one universal bar and lone'mei'nber 15 but that there 1s a seriesofeach ofthe other elements.

.It will be apparent that, owing tothe curvature of the typeharse ment,the type bar operating springs,if ancforedfat points in the sametransverse plane on` member 15,- will be unequally extended; 1fihat. is,those springs thateare furthest away Ifrom the center, transversely,ofumembe'r-` 15, will be more extended than the others.'

lnPatent No.11,084,547 of AJanuary 13, 1914, the universal lb'ar linkand the type bar operating spring are-.secured tothe draw link by meansof axed pendant so that the difference in the tension of the springs isnot compensated for. .These pendants, however, occupy a certain amountof space and, create congestion owing to the confinement of theintermediate connections in a limited space. ln Patent No. 1,390,708 ofSept. 13, 1921 a certain new and advantageous construction is disclosedwhereby the pendants of Patent No. 1,084,547 are done away with, but n0means'are shown to compensate for the dierence in extension of thesprings. Also, since inl Patent No. 1,390,708 the universal bar link andtype bar operating springs are connected to the heel of the type bar atdiferent points, the movement ofthe type bar will produce unequalmovements of the link) and spring which has certain disadvantages.

These diiliculties are obviated in the construction shown in F igs. 1and '2 of the present application in that one of the links in the trainof connections, in this case the universal bar link, is providediwith anintegral looped portion 16 intermediate its ends in which the end ofspring 14 is secured. In addition to this, anchorage 15 is of a peculiarconstruction in that this anchorage, which extends transversely of themachine, has points of attachment for the springs, indicated by holes17, that are arranged in a horizontal plane and in concave curvedrelation with respect to a vertical plane passing transversely throughthe type bar segment to thereby equalize the tension on the springs: or,defining thef anchorage with relation to a vertical plane passingtransversely of the machine through the rear frame 18 thereof, it ivillbe seen that the points oit attachment 17 for the springs are arrangedVtrom the center toivard each end of member 15 at a progressivel)vincreasing distance with respect to the plane of the rear Wall.

ln Fig. 3 is shown a modified form of the invention. Hei-e draw link 9is provided with an integral looped portion 18 inter1nediate its endsand universal bar link 13 is hooked into the loiver part of the loopwhile the type bar operating spring is secured in the upper part ot theloop.

ln both Figs. l and 3, it will be observed.y the type bar operatingspring is connected at a fixed point in the train ot connections, thecompensation for inequality of extension of the springs being obtainedby curved anchorage l5.

As is usual, in machines ot this character, member l5 may be mounted torock on center 19 and is adjustable toward and away from the typesegment by means of screw 20.

' l/Ve claim:

1. A type bar action for typevvriting ma chines comprising: a curvedtype bar segment, a series of type bars pivotally support ed in thesegment, a series of key levers, a universal bar, a series ofintermediate connections between the type bars, key levers and theuniversal bar, a series of type bar operating springs, one for each typebar, each spring connected at a liked point in the train or connectionscomposed of the type bars, key levers. universal bar and iiitermediateconnections, and an anchorage for said springs, extending transverselyorq the machine, the points of attachment for the springs, on saidanchorage being arranged in a horizontal plane and in concave curvedrelation With respect to a vertical plane passing transversely throughthe type bar segment to thereby equalize the tension on the springs.

2. A type'bar action for typevvriting machines comprising: a curved typebar segment, a series of type bars pivotally supported in the segment, aseries ot key levers, a universal bar, a series of intermediateconnections `bet-Ween the type bars, key levers and the\universal bar, aseries of type bar operating springs, one for each type bar, each springconnected at a fixed point in the train of connections com posed of thetype bars, key levers, universal bar and intermediate connections, ananc-horage for said springs, extending transverselyT of the machine, thepoints of attachment for the springs on said anchorage being arranged ina horizontal plane and in concave curved relation with respect to avertical rfi-sacan plane passing transversely through the type barsegment to thereby equalize the tension on the springs, and means foradjusting the anchorage toward and away from the type bar segment.

3. A type bar action for typewriting ma* chines comprising: a curvedtype bar segment, a. series ot' type bars pivotally supported in thesegment, a series ot key levers, a universal bar. a series otintermediate connections between the type bars, key levers, and theuniversal bar, one oi said connections in each series consisting` oi alink having an integral looped portion intermediate, its ends, a seriesol type bar operating springs, one Yfor each type bar, each springconnected to the looped portion ot a link, and an anchorage l'or saidsprings, extending transversely ol the machine, the points of attachmenttor the springs on said anchorage being arranged in a horizontal planeand in concave curved relation with respect to a vertical plane passingtransversely through the type bar segment to thereby equalize thetension on the springs.

4. A type bar action Yfor typewriting machines comprising: atransversely extending and vertically curved type bar segment, a seriesof forwardly recumbent type bars pivotally supported in said segment, aseries of key levers, a universal bar, a series orn intermediateconnections between the type bars, key llevers and the universal bar, aseries ot type bar operating springs, one for each type bar, eachsprinor connected at a fixed point in the train of connections composedof the type bars, key levers, universal bar and intermediateconnections, and an anchorage tor said springs, extending transverselyof the machine, the points of attachment for the springs on saidanchorage being arranged in a horizontal plane and in concave curvedrelation vvith respect to a vertical plane passing transversely throughthe type bar segment to thereby equalize the tension on the springs.

5. A'. type bar action for typevvriting machines comprising: atransversely extending and vertically curved type bar segment, a seriesor forwardly recumbent type bars pivotally supported in said segment, aseries of key levers, a universal bar, a series of intermediateconnections between the type bars, ey levers and the universal bar, oneof said connections in each series consisting of a link having anintegral looped portion intermediate its ends, a series et' type baroperating springs, one for each type bar, each spring connected to thelooped portion of a link, and an anchorage for said springs, extendingtransversely of the machine, the points of attachment for the springs onsaid anchorage being arranged in a horizontal plane and in concavecurved relation with respect to a vertical plane passing trans verselythrough the type bar segment to thereby equalize the tension on thesprings.

6. A type bar action for typewriting machines comprising: a curved typebar segment, a series of type bars pivotally supported in the segment, aseries of key levers, intermediate connections for actuating the typebars from the key levers, a universal ar, a series of universal barlinks between the universal bar and the train of connections includingthe key levers and the type bars, a series of type bar operatingsprings, one spring surrounding each link, and an anchorage for saidsprings, extending transversely of the machine, the points of attachmentfor the springs being arranged in a horizontal plane and in concavecurved relation with respect to a vertical plane passing transverselythrough the type bar segment to thereby equalize the tension on thesprings.

7 A type bar action for typewriting machines comprising: a transverselyextending and vertically curved type bar segment, a series of forwardlyrecumbent type bars pivotally supported in said segment, a series of keylevers, intermediate connections for actuating the type ba'rs from thekey levers,

a universal bar, a series of universal bar links between the universalbar and the train of connections including the key levers and type bars,a series of type bar operating springs, one spring surrounding eachlink, and an ing transversely of the machine, the points of attachmentfor the springs being arranged in a horizontal plane and in concavecurved relation with respect to a vertical plane passing transverselythrough the type bar segment to thereby equalize the tension on thesprings.

8. An anchorage for type bar 'operating springs consisting of a memberextending transversely of the machine the points of attachment ranged,from the center toward each end of said member, at a progressivelyincreasing distance with respect to a vertical plane passingtransversely of the machine through' therear frame thereof.

Signed at Hartford in the county of Hart- -ford and State of Connecticutthis 26 day of June, 1922.

BERNARD J. DOWD. AN THON YA UTZ.

anchorage for said springs, extendthereto for the springs being ar-v

